Mössbauer spectroscopy
With everything you learned in the previous videos, it is now straightforward to turn nuclear resonant scattering in a useful spectroscopy. You will understand how the different types of hyperfine interactions lead to a characteristic Mössbauer spectrum. And conversely, you’ll understand how to interpret a given (experimental) Mössbauer spectrum.
There is some optional material for this chapter, where you can dig deeper if you want. But first the task: The video shows an example of a Mössbauer spectrum for a magnetic hyperfine interaction, measured at 200, 50 and 18 K. This series of spectra shows that a magnetic field gets established if temperature drops. At 50K, you see the first traces of the field being present. Is that hyperfine field smaller or larger than the field at 18 K? How would you describe what happens inside the sample if you go from 50 to 18 K?
Write your answer in the forum, and comment on some answers of your colleagues if you feel like:
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Here is some optional material to dig deeper if you feel like :
- The 1961 Nobel lecture by Rudolphe Mössbauer — quite accessible reading.
- The quantum explanation of the Mössbauer effect by Giovanelli & Orefice, which was mentioned briefly in the video.
- In order to assess your understanding, you may want to check how far you get reading the Wikipedia page about Mössbauer spectroscopy or watching this 40-minute comprehensive Youtube-video.
- Chapter 11 of this book summarizes Mössbauer spectroscopy (Gutlich and Schroder, not for free).
Expected time: 25 minutes (report)
B07-04